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| </pre><pre class="rust"><code><span class="comment">// Copyright 2016 Masaki Hara |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| </span><span class="doccomment">//! A library for reading and writing ASN.1 data. |
| //! |
| //! # Examples |
| //! |
| //! ## Encoding/decoding simple data |
| //! |
| //! A type implementing [`DEREncodable`][derencodable] can be easily encoded: |
| //! |
| //! [derencodable]: trait.DEREncodable.html |
| //! |
| //! ``` |
| //! extern crate yasna; |
| //! |
| //! fn main() { |
| //! let der = yasna::encode_der(&(10, true)); |
| //! println!("(10, true) = {:?}", der); |
| //! } |
| //! ``` |
| //! |
| //! Similarly, a type implementing [`BERDecodable`][berdecodable] can be |
| //! easily decoded: |
| //! |
| //! [berdecodable]: trait.BERDecodable.html |
| //! |
| //! ``` |
| //! extern crate yasna; |
| //! |
| //! fn main() { |
| //! let asn: (i64, bool) = yasna::decode_der( |
| //! &[48, 6, 2, 1, 10, 1, 1, 255]).unwrap(); |
| //! println!("{:?} = [48, 6, 2, 1, 10, 1, 1, 255]", asn); |
| //! } |
| //! ``` |
| //! |
| //! ## Encoding/decoding by hand |
| //! |
| //! Default `DEREncodable`/`BERDecodable` implementations can't handle |
| //! all ASN.1 type. In many cases you have to write your reader/writer |
| //! by hand. |
| //! |
| //! To serialize ASN.1 data, you can use [`construct_der`][construct_der]. |
| //! |
| //! [construct_der]: fn.construct_der.html |
| //! |
| //! ``` |
| //! extern crate yasna; |
| //! |
| //! fn main() { |
| //! let der = yasna::construct_der(|writer| { |
| //! writer.write_sequence(|writer| { |
| //! writer.next().write_i64(10); |
| //! writer.next().write_bool(true); |
| //! }) |
| //! }); |
| //! println!("(10, true) = {:?}", der); |
| //! } |
| //! ``` |
| //! |
| //! To deserialize ASN.1 data, you can use [`parse_ber`][parse_ber] |
| //! or [`parse_der`][parse_der]. |
| //! |
| //! [parse_ber]: fn.parse_ber.html |
| //! [parse_der]: fn.parse_der.html |
| //! |
| //! ``` |
| //! extern crate yasna; |
| //! |
| //! fn main() { |
| //! let asn = yasna::parse_der(&[48, 6, 2, 1, 10, 1, 1, 255], |reader| { |
| //! reader.read_sequence(|reader| { |
| //! let i = try!(reader.next().read_i64()); |
| //! let b = try!(reader.next().read_bool()); |
| //! return Ok((i, b)); |
| //! }) |
| //! }).unwrap(); |
| //! println!("{:?} = [48, 6, 2, 1, 10, 1, 1, 255]", asn); |
| //! } |
| //! ``` |
| |
| </span><span class="attribute">#![forbid(unsafe_code)] |
| #![deny(missing_docs)] |
| |
| #[cfg(feature = <span class="string">"num-bigint"</span>)] |
| </span><span class="kw">extern crate </span>num_bigint; |
| <span class="attribute">#[cfg(test)] |
| </span><span class="kw">extern crate </span>num_traits; |
| |
| <span class="attribute">#[cfg(feature = <span class="string">"bit-vec"</span>)] |
| </span><span class="kw">extern crate </span>bit_vec; |
| <span class="attribute">#[cfg(feature = <span class="string">"chrono"</span>)] |
| </span><span class="kw">extern crate </span>chrono; |
| |
| <span class="kw">pub mod </span>tags; |
| <span class="kw">pub mod </span>models; |
| <span class="kw">mod </span>writer; |
| <span class="kw">mod </span>reader; |
| <span class="kw">mod </span>deserializer; |
| <span class="kw">mod </span>serializer; |
| |
| <span class="kw">pub use </span>writer::{construct_der,try_construct_der}; |
| <span class="kw">pub use </span>writer::{construct_der_seq,try_construct_der_seq}; |
| <span class="kw">pub use </span>writer::{DERWriter,DERWriterSeq,DERWriterSet}; |
| <span class="kw">pub use </span>reader::{parse_ber_general,parse_ber,parse_der,BERMode}; |
| <span class="kw">pub use </span>reader::{BERReader,BERReaderSeq,BERReaderSet}; |
| <span class="kw">pub use </span>reader::{ASN1Error,ASN1ErrorKind,ASN1Result}; |
| <span class="kw">pub use </span>deserializer::{BERDecodable,decode_ber_general,decode_ber,decode_der}; |
| <span class="kw">pub use </span>serializer::{DEREncodable,encode_der}; |
| |
| <span class="doccomment">/// A value of the ASN.1 primitive/constructed ("P/C") bit. |
| </span><span class="attribute">#[derive(Debug, Clone, Copy, Eq, PartialEq, Ord, PartialOrd, Hash)] |
| </span><span class="kw">pub enum </span>PCBit { |
| <span class="doccomment">/// The bit's value is "Primitive" |
| </span>Primitive = <span class="number">0</span>, |
| <span class="doccomment">/// The bit's value is "Constructed" |
| </span>Constructed = <span class="number">1</span>, |
| } |
| |
| <span class="doccomment">/// An ASN.1 tag class, used in [`Tag`][tag]. |
| /// |
| /// [tag]: struct.Tag.html |
| /// |
| /// A tag class is one of: |
| /// |
| /// - UNIVERSAL |
| /// - APPLICATION |
| /// - context specific |
| /// - PRIVATE |
| </span><span class="attribute">#[derive(Debug, Clone, Copy, Eq, PartialEq, Ord, PartialOrd, Hash)] |
| </span><span class="kw">pub enum </span>TagClass { |
| <span class="doccomment">/// The UNIVERSAL tag class |
| </span>Universal = <span class="number">0</span>, |
| <span class="doccomment">/// The APPLICATION tag class |
| </span>Application = <span class="number">1</span>, |
| <span class="doccomment">/// The CONTEXT-SPECIFIC tag class |
| </span>ContextSpecific = <span class="number">2</span>, |
| <span class="doccomment">/// The PRIVATE tag class |
| </span>Private = <span class="number">3</span>, |
| } |
| |
| <span class="kw">const </span>TAG_CLASSES : [TagClass; <span class="number">4</span>] = [ |
| TagClass::Universal, |
| TagClass::Application, |
| TagClass::ContextSpecific, |
| TagClass::Private, |
| ]; |
| |
| <span class="doccomment">/// An ASN.1 tag. |
| /// |
| /// An ASN.1 tag is a pair of a tag class and a tag number. |
| /// |
| /// - A tag class is one of: |
| /// - UNIVERSAL |
| /// - APPLICATION |
| /// - context specific |
| /// - PRIVATE |
| /// - A tag number is a nonnegative integer. |
| /// In this library. Tag numbers are assumed to be in `u64`. |
| </span><span class="attribute">#[derive(Debug, Clone, Copy, Eq, PartialEq, Ord, PartialOrd, Hash)] |
| </span><span class="kw">pub struct </span>Tag { |
| <span class="doccomment">/// The tag class |
| </span><span class="kw">pub </span>tag_class: TagClass, |
| <span class="doccomment">/// The tag number |
| </span><span class="kw">pub </span>tag_number: u64, |
| } |
| |
| <span class="kw">impl </span>Tag { |
| <span class="doccomment">/// Constructs an APPLICATION tag, namely \[APPLICATION n\]. |
| </span><span class="kw">pub fn </span>application(tag_number: u64) -> Tag { |
| <span class="kw">return </span>Tag { |
| tag_class: TagClass::Application, |
| tag_number, |
| } |
| } |
| <span class="doccomment">/// Constructs a context specific tag, namely \[n\]. |
| </span><span class="kw">pub fn </span>context(tag_number: u64) -> Tag { |
| <span class="kw">return </span>Tag { |
| tag_class: TagClass::ContextSpecific, |
| tag_number, |
| } |
| } |
| <span class="doccomment">/// Constructs a PRIVATE tag, namely \[PRIVATE n\]. |
| </span><span class="kw">pub fn </span>private(tag_number: u64) -> Tag { |
| <span class="kw">return </span>Tag { |
| tag_class: TagClass::Private, |
| tag_number, |
| } |
| } |
| } |
| </code></pre></div> |
| </section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="yasna" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.66.0-nightly (5c8bff74b 2022-10-21)" ></div></body></html> |
